If you were to visualize the relationship between internal and external validity, you would picture a(n)

Each July, researchers visit the Briarwood Retirement Community. They conduct tests of physical and cognitive functioning with residents, who have been participating in the research for the past 15 years. Which of the following are the researchers using?

a. sequential design b. longitudinal study c. cross-sectional study d. meta-analysis

Interparticipant replication involves

a. repeating the effects of the independent variable with a single participant b. determining whether an effect generalizes to other participants c. comparing the average responses of two or more groups of participants d. testing the same participant under several different experimental conditions e. none of the above